1131220321120 has 96 divisors (see below), whose sum is σ = 2769136826400. Its totient is φ = 436178190336.

The previous prime is 1131220321111. The next prime is 1131220321163. The reversal of 1131220321120 is 211230221311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2675232 + ... + 3069088.

It is an arithmetic number, because the mean of its divisors is an integer number (28845175275).

Almost surely, 2^{1131220321120} is an apocalyptic number.

1131220321120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131220321120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1384568413200).

1131220321120 is an abundant number, since it is smaller than the sum of its proper divisors (1637916505280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131220321120 is a wasteful number, since it uses less digits than its factorization.

1131220321120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394520 (or 394512 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1131220321120 its reverse (211230221311), we get a palindrome (1342450542431).

The spelling of 1131220321120 in words is "one trillion, one hundred thirty-one billion, two hundred twenty million, three hundred twenty-one thousand, one hundred twenty".